1 /* $NetBSD: alpha_pci_conf.c,v 1.2 2001/07/17 17:46:42 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Support for accessing PCI configuration space. This is currently 41 * used to provide such support for XFree86. In a perfect world, this 42 * would go away in favor of a real bus space mapping framework. 43 */ 44 45 #include <sys/param.h> 46 47 #include <machine/sysarch.h> 48 49 uint32_t 50 alpha_pci_conf_read(u_int bus, u_int device, u_int func, u_int reg) 51 { 52 struct alpha_pci_conf_readwrite_args args; 53 54 args.write = 0; 55 args.bus = bus; 56 args.device = device; 57 args.function = func; 58 args.reg = reg; 59 60 if (sysarch(ALPHA_PCI_CONF_READWRITE, &args) == -1) 61 return (0xffffffffU); 62 63 return (args.val); 64 } 65 66 void 67 alpha_pci_conf_write(u_int bus, u_int device, u_int func, u_int reg, 68 uint32_t val) 69 { 70 struct alpha_pci_conf_readwrite_args args; 71 72 args.write = 1; 73 args.bus = bus; 74 args.device = device; 75 args.function = func; 76 args.reg = reg; 77 args.val = val; 78 79 (void) sysarch(ALPHA_PCI_CONF_READWRITE, &args); 80 } 81